HAMMER OF THE ANCIENTS [5/5]

A heavy hit with Ancient Hammer. You want to use it when you have maximum Fury to benefit the most from the advancement bonuses. The AoE starts small, but it gets better with more Skill Ranks and relevant Legendary Aspect. 

Modifiers:

1. Enhanced Hammer of the Ancients [1/1] - improves your Fury generation so you can use this ability more often. 
2. Furious Hammer of the Ancients [1/1] - massively increase your Damage for each point of Fury you have. This allows for much better scaling than most other Skills. 

LUNGING STRIKE [1/5]

Performs a quick dash to the enemy and generates some Fury. It is great for overall mobility, but you can also use the Flay for better Vulnerability uptime on enemies. 

Modifiers:

1. Enhanced Lunging Strike [1/1] - restores a bit of your Maximum Life when you Hit an Enemy with more than 80% of his maximum Life. 
2. Combat Lunging Strike [1/1] - you will occasionally gain the Berserking buff when you use this ability, depending on your Cricial trike Chance. In the case of Flay, pick the Combat upgrade to get Damage Reduction. 

RALLYING CRY [5/5]

Grants lots of Movement Speed and even more Resource Generation for a short time. 

Modifiers:

1. Enhanced Rallying Cry [1/1] - makes you Unstoppable for the Cry duration, making you unaffected by Crowd Control effects. 
2. Tactical Rallying Cry [1/1] - grants you 20 Fury on use, and improves the Resource Generation buff.

CHALLANGING SHOUT [3/5]

A defensive Shout that greatly Reduces the Damage you take for 6 seconds after use. It also Taunts nearby Enemies, which may be useful when you play with friends. 

Modifiers:

1. Enhanced Challenging Shout [1/1] - grants you 20% more Life to make you even more durable. 
2. Tactical Challenging Shout [1/1] - taking Damage generates a bit of Fury which you can immediately spend to retaliate.  

WAR CRY [5/5]

A main offensive Shout, after using it you will deal increased Damage for 6 seconds. 

Modifiers:

1. Enhanced War Cry [1/1] - it will also grant you a Berserking buff, which greatly improves your Damage and Movement Speed. 
2. Power War Cry [1/1] - when you face more than 6 Enemies, the Damage buff becomes stronger.  

WRATH OF THE BERSERKER [1/1]

It is your Ultimate Ability, it grants you the Berserking status for up to 15 seconds if you keep fighting Enemies. 

Modifiers:

1. Prime Wrath of the Berserker [1/1] - increases your Movement Speed and Fury Generation during its duration.
2. Supreme Wrath of the Berserker [1/1] - spending Fury allows you to ramp up the Damage bonuses of Berserk. 

PRESSURE POINT [3/3]

IMPOSING PRESENCE [3/3]

MARTIAL VIGOR [3/3]

BOOMING VOICE [3/3]

AGGRESSIVE RESISTANCE [3/3]

PROLIFIC FURY [3/3]

PIT FIGHTER [3/3]

NO MERCY [3/3]

HAMSTRING [1/3]

UNBRIDLED RAGE

Two-Handed Sword Expertise

You can never have too many Cooldown Reductions, Critical Strike Chance and Damage, Vulnerability Damage, and Resource Generation. You should also look for additional Ranks for your main Skills and extra maximum Fury which will massively improve your Damage through the Hamme of the Ancientr's upgrade. As Barbarian you can use 3 sets of Weapons, make sure the Bludgeon is the strongest one DPS-wise, as it will be used by Hammer of the Ancient. On the remaining ones, you should look just for the statistics that will make your Hammer stronger. 
Movement Speed and Berserking Duration are not mandatory, but will greatly help with an overall feeling of the Build. For defenses, you will want to stack as much Damage Reduction as you can, with plenty of maximum Life on top of that. Resistances on Gear should be avoided for now, as they are currently useless at improving your survivability. You should also have some increased Damage rolls, for example against Slowed or Close Enemies, but you will gain tons of such modifiers on your Paragon Board anyway. 

As always, you should put Sapphires in your Weapons since you can very easily trigger the required condition for them. In Armor Sockets, the Ruby will work the best as it increases your Maximum Life. For Jewelry only the Skulls are an acceptable choice. 

OPTIONAL UNIQUE ITEMS

Rage of Harrogath (Armour) - a decent option if you happened to obtain one. It provides much better uptime on your Shouts when you fight Elite Enemies, and some useful stats on top of that.

+Physical Damage

+Physical Critical Strike Chance against Elites

+Damage Reduction from Bleeding Enemies

+Thorns

Lucky Hit: Up to a [20 - 40%] chance to reduce the Cooldowns of your Non-Ultimate Skills by 1.5 seconds when you inflict Bleeding on Elites.

Temerity (Pants) - BiS Item for most Builds currently, grants you a very strong Barrier based on your overhealing. It also boosts your regular Healing, making it a very defense-packed option. 

+ Potion Charges

+ Potion Drop Rate

+ Lucky Hit: Chance to Heal

+ Healing

Effects that Heal you beyond 100% Life grant you a Barrier up to [40 - 80%] of your Maximum Life that lasts for 8 seconds.

Mother's Embrace (Ring) - very useful Ring that allows you to spam your Core ability more often in AoE situations.  

+Critical Strike Chance

+Critical Strike Damage

+Overpower Damage

+Core Skill Damage

If a Core Skill hits 5 or more Enemies, [20 - 40%] of the Resource cost is refunded.

CODEX OF POWER
Legendary Aspects

Mandatory/Heavily recommended Aspects

1. Aspect of Ancestral Force doubles your Damage and AoE by sending out a shockwave after every use of the Hammer of the Ancients.  You should imprint it on a 2-handed Weapon for better results.
2. Conceited Aspect increases your Damage when you have an active Barrier, which you will have very often thanks to the Temerity. 
3. Edgemaster's Aspect is another powerful multiplier for your Damage depending on the maximum Resources you have.
4. Bold Chieftain's Aspect is necessary to improve your Shouts Cooldowns. It scales with the number of Monsters near you. 
5. Aspect of Echoing Fury generates Rage while you have active Shout. Try to always have at least one Shout active at all times.

Optional Aspects

1. Accelerating Aspect Critical Strikes with your Core Skills will increase your Attack Speed, allowing you to generate and spend Fury faster.    
2. Aspect of Limitless Rage once you start overgenerating Fury you can use this Aspect to boost the Damage of your Hammer.
3. Aspect of Might Basic Skills are used for mobility and Fury generations anyway, so with this Aspect you will gain free 20% Damage Reduction. 
4. Aspect of Disobedience takes a bit of time to get the full benefit of this Aspect, but the wait is definitely worth it to improve your Armour so much. 
5. Aspect of Numbing Wrath is your main way of generating Fortify, which reduces your Damage Taken once you accumulate enough of it. 
6. Ghostwalker Aspect being Unstoppable grants you extra Movement Speed and the ability to move through the enemies without getting stuck. 

1st Board - Starting Board

Nodes - Path through the Damage and Glyph Socket, and come back to fulfill the remaining lesser Nodes when you have more Points to Spend.

Glyphs - At first use the Exploit Glyph here just to inflict the Vulnerability on the first Hit. Later put in the Crusher for more Damage. 

2nd Board - Warbringer Board
Legendary Node in the Down Left corner

Nodes - Warbringer is an excellent Node to generate Fortify as you will spend your Fury almost all the time. It also has all 3 types of Rare Nodes we would want: Raw Power for Damage, Hungering Fury for Resources, and Guarded Advance for durability. 

Glyphs - here is the best place to put the Exploit Glyph. 

3rd Board - Flawless Technique Board
to the Left Side of the Warbringer Board
Legendary Node in the Down Middle

Nodes - this Legendary Node is actually not useful for us, but the Havoc Node available here is extremely powerful. The Brash is also good to improve your survival. 

Glyphs - Territorial Glyph further emphasizes the Close combat style of the Barbarians. 

4th Board - Decimator Board
below of the Flawless Technique Board
Legendary Node in the Top Middle

Nodes - another Legendary Node that you should skip, but keep the board for powerful Rare Node bonuses. The Arrogance and Demolish grant offensive and defensive powers against Vulnerable Enemies. 

Glyphs - The Marshal Glyph socketed there greatly boosts the effectiveness of nearby Nodes. It also reduces the Cooldown of your Shouts. 

5th Board - Blood Rage Board
to the right of the Decimator Board
Legendary Node in the Down Right corner

Nodes - The Blood Rage is not a bad Node, but it is just too inefficient to pick it up. Instead, try to path for the Grit, Revel, and the next gateway. 

Glyphs - It is a good place to put the Ire Glyph, which further boosts the Damage you have while Berserking is active. 

6th Board - Bone Breaker Board
above of the Blood Rage Board
Legendary Node in the Top Right corner

Nodes - the final Board, and it also doesn't pick up the Legendary Node. It is however great Board for the specific Glyph.

Glyphs - Wrath Glyph greatly benefits from all the Dexterity Nodes available here. It also grants you Fury Generation when you fulfill the requirements.

END NOTE

This is the beta version of our Tornado Druid Build for Diablo 4. The game has just launched so we expect all of the Guides will require constant updates when we get to test all the builds properly. Make sure to check out the Guides regularly to keep track of all the changes!

If you have any Build requests, please post them in the Comments section below. We will be happy to cover your most requested builds in the future! Also, we hope that you have found this guide useful and informative. Also, we will be happy to receive constructive criticism that will help us improve our future work, so don't hesitate to give us your feedback.